题目内容

In the late afternoon, slow to go home, he ________ on an elderly doctor friend and played tennis.

A. dropped in
B. moved away
C. dropped for
D. moved forward

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Somehow she rose over her excitement, though, and concentrated all she could on the task ________.

A. off hand
B. with hand
C. at hand
D. before hand

In an effort to eliminate ________ fog from airports, weathermen use giant fans, and chemicals dropped from planes or shot upwards from strange machines on the ground.

A. dense
B. compressed
C. concentrated
D. closed

幼儿期生长激素分泌不足可致

A. 呆小症
B. 巨人症
C. 尿崩症
D. 侏儒症
E. 糖尿病

下列对激素描述中错误的是

A. 在血液中含量极微但却有高度生物活性
B. 正常情况下在血液中浓度相对稳定
C. 激素过多或过少可出现疾病
D. 激素结合的特异性受体不足也可出现疾病
E. 激素本身可给靶细胞提供能量