题目内容

Since many insects have already become（）to DDT, scientists have to look for some new insecticide

A. active
B. resistant
C. tough
D. gradual

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He（）the medicine quickly and then drank some orange juice.

A. sucked
B. swallowed
C. licked
D. digested

Her pulse was so weak that the doctor had difficulty（）it.

A. inspecting
B. detecting
C. touching
D. contacting

下列关于影响儿童心理发展的客观条件叙述的不正确的有（）。

A. 环境不会影响生理成熟
B. 环境影响遗传物质因素的变化
C. 遗传物质及其后的生理发展制约着环境对儿童心理的影响
D. 对影响儿童心里发展的客观因素应作具体的和综合的分析

There is need to check the（）of the report.

A. frequency
B. accuracy
C. emergency
D. efficiency