做平抛运动的物体,每秒的动量增量总是( ) A.大小相等方向相同 B.大小不等方

题型:选择题

问题:

做平抛运动的物体,每秒的动量增量总是(  )

A.大小相等  方向相同

B.大小不等  方向不同

C.大小相等  方向不同

D.大小不等  方向相同

考点:平抛运动
题型:选择题

通脉四逆汤与四逆汤不同之处在于()

A.甘草用量较大

B.干姜用量较大

C.干姜、附子用量较大

D.附子用量较大

E.甘草干姜用量较大

题型:选择题

急性肾小球肾炎多见于下列何种细菌感染后()

A.葡萄球菌

B.肺炎双球菌

C.链球菌

D.伤寒杆菌

E.变形杆菌

题型:选择题

根据中文提示或所给单词,写出正确的单词 (每空1分,共10分)

1. The ____________(交通) light is green. You can cross the street.

2. Many students in our class have poor ___________(视力) and they have to wear glasses.

3. Xu Xiake is ________________(出名的) in China.

4. Do you know the __________(重量) of the elephant?          

5. My uncle doesn’t like ______________( 西方的) food .

6. —Whose watches are these?   —They’re the _________ (swim) .

7. Take good care of _____________(you) when you go on a trip , boys and girls.

8. Yesterday he did his homework ____________(careful) and made many mistakes. His teacher was very unhappy.

9. After taking the medicine, he felt even _______________(bad). So he had to stay in bed .

10. He often tells us funny jokes to make us ________________ (please) .

题型:选择题

胚裂由中央向前后逐渐闭合的时间是()

A.胚胎第3周

B.胚胎第5周

C.胚胎第10周

D.胚胎3个月

E.胚胎5个月

题型:选择题

一般来说,土壤的腐蚀性通常按()大小进行分级。

A、土壤含盐总量

B、土壤PH值

C、氧化还原电位

D、土壤电阻率

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