样题与解析

以下是本题库中的部分真题与完整解析。完整题库请用上方的刷题工具。

1. 1. Mathematics

   What is 3/4 + 1/6?

   • a.7/12
   • b.11/12
   • c.1/2
   • d.4/10

   答案: b

   解析: Find a common denominator of 12: 3/4 = 9/12 and 1/6 = 2/12. Adding gives 9/12 + 2/12 = 11/12, which cannot be reduced.

2. 2. Reading Comprehension

   Read the passage: 'Water covers about seventy percent of Earth's surface, yet most of it is salt water unsuitable for drinking.' What is the topic?

   • a.Ocean animals
   • b.Drinking habits
   • c.Earth's water
   • d.Weather patterns

   答案: c

   解析: The topic is the general subject the passage discusses. This passage focuses on how much of Earth is water and how much of it can be used for drinking.

3. 3. Grammar

   Choose the correct sentence.

   • a.The nurse and the doctor is both present.
   • b.The nurse and the doctor were both present.
   • c.The nurse and the doctor be both present.
   • d.The nurse and the doctor was both present.

   答案: b

   解析: A compound subject joined by 'and' is plural and takes a plural verb. 'The nurse and the doctor' requires 'were,' not 'was.'

4. 4. Science

   Which chamber of the heart pumps oxygen-rich blood out into the aorta?

   • a.Right ventricle
   • b.Left atrium
   • c.Left ventricle
   • d.Right atrium

   答案: c

   解析: The left ventricle has the thickest wall because it must drive blood through the entire systemic circuit by way of the aorta. The right ventricle pumps only as far as the lungs through the pulmonary trunk, and both atria are receiving chambers that move blood a few centimetres into the ventricle below them.

5. 5. Science

   Which part of a neuron receives incoming signals from other neurons?

   • a.The axon
   • b.The axon terminal
   • c.The dendrites
   • d.The myelin sheath

   答案: c

   解析: Dendrites are the branching extensions that collect input and carry it toward the cell body. The axon conducts the impulse away, the axon terminal releases neurotransmitter onto the next cell, and the myelin sheath is insulation rather than a receiving structure.

6. 6. Mathematics

   Which of these fractions has the greatest value?

   • a.2/3
   • b.5/8
   • c.3/5
   • d.7/12

   答案: a

   解析: Rewrite all four over 120: 2/3 = 80/120, 5/8 = 75/120, 3/5 = 72/120 and 7/12 = 70/120. Comparing numerators shows 80/120 is the largest, so 2/3 wins; the other three fall just below it in the order listed.

7. 7. Mathematics

   A child is to receive 2 teaspoons of syrup. How many milliliters is that? (1 tsp = 5 mL)

   • a.10 mL
   • b.2.5 mL
   • c.15 mL
   • d.30 mL

   答案: a

   解析: Multiply the number of teaspoons by 5, so 2 x 5 = 10 mL. Dividing instead of multiplying gives 2.5 mL, 15 mL is one tablespoon, and 30 mL is a full fluid ounce.

8. 8. Reading Comprehension

   Read the passage: 'The recipe calls for a scant cup of flour. Use slightly less than a full measure, or the dough will turn out tough.' In this passage, 'scant' most nearly means:

   • a.heaping
   • b.exactly level
   • c.barely enough
   • d.doubled

   答案: c

   解析: The second sentence defines the word by telling the cook to use slightly less than a full cup. Heaping and doubled both mean more rather than less, and exactly level would be a full measure, which is what the passage warns against.

9. 9. Vocabulary

   The chart described the patient's blood pressure as labile. This means it:

   • a.stays within the normal range
   • b.is dangerously low at all times
   • c.changes often and unpredictably
   • d.has not been measured recently

   答案: c

   解析: Labile means unstable or liable to shift, so a labile pressure swings from reading to reading. A steady reading would be stable, a persistently low one would be described as hypotensive, and an unmeasured value would simply be missing.

10. 10. Vocabulary

    The instructions were ambiguous, so two nurses read them differently. Ambiguous means:

    • a.open to more than one meaning
    • b.written in very small print
    • c.much too long to read
    • d.printed in another language

    答案: a

    解析: Ambiguous wording can be understood in more than one way, which is why the two readings differed. Small print, excessive length and a foreign language all make text hard to read without making its meaning double.