题目内容

Sometimes I like to go ______ with my brother.

A. swim
B. swam
C. swimming
D. swims

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People should help the ______ if they haveability.

A. disable
B. disabled
C. disables
D. able

There are ______ people here in the lake.

A. a lot of
B. a lot
C. lots
D. a lots

关于消化道平滑肌生理特性的说法,正确的是

A. 兴奋性比骨骼肌高
B. 收缩速度较慢
C. 伸张性小
D. 对化学刺激不敏感

切断胃肠神经支配后,消化道平滑肌的慢波

A. 立即消失
B. 显著升高
C. 立即减弱
D. 依然存在