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问题 不定项选择

关于重力加速度的下列说法中，正确的是[ ]

A．重力加速度g是标量，只有大小，没有方向，通常计算中g取9.8 m/s2

B．在地球上不同的地方，g的大小不同，但它们相差不是很大

C．在地球上同一地点，一切物体在自由落体运动中的加速度都相同

D．在地球上的同一地方，离地面高度越大，重力加速度g越小

答案

BCD

阅读理解

Hello, I’m Kate. This is a photo of my aunt’s family. The woman in the photo is my aunt, Jane. She is a teacher and she is very kind(善良). These are my cousins Jim and Jack. They are seven and they are twins(双胞胎). Look! That lovely（可爱的） baby is my aunt’s little daughter, Rose. She is only one. I love them very much.

小题1:There are ______ people in the photo.

A．three

B．four

C．five

D．six小题2:My aunt has _______.

A．two daughters

B．two sons and a daughter

C．two daughters and a son

D．only one son小题3:Rose is my aunt’s _______.

A．son

B．sister

C．mother

D．daughter小题4:Jim and Jack are_______.

A．eleven

B．brother and sister

C．twins

D．mother and son小题5:Rose is Kate’s _______.

A．sister

B．mother

C．cousin

D．teacher
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填空题

生物因素主要是指______与______之间的______，包括______之间和______之间的______．
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