I go to ______ with Linda every morning.
A. schools
B. the schools
C. school
D. an school
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I usually go to bed at 10:00 ______ night.
A. in
B. on
C. about
D. at
I have two eggs and some milk ______ breakfast.
A. for
B. on
C. with
D. in
The city museum closes ______ 7 o’clock in the evening.
A. at
B. from
C. on
D. of
在“呼吸运动调节”实验中,家兔吸入CO2后,可引起呼吸幅度增大,有关调节机制错误的是
A. CO2直接刺激延髓化学感受器
B. CO2刺激颈动脉体化学感受器
CO2刺激主动脉体化学感受器
D. 反射性引起吸气神经元冲动传出增加
E. 反射性引起隔肌和肋间外肌收缩加强