下列物质不属于有毒物质的是 A.黄曲霉素 B.氯化钠 C.甲醛 D.二氧化硫

题型:选择题

问题:

下列物质不属于有毒物质的是

A.黄曲霉素

B.氯化钠

C.甲醛

D.二氧化硫

考点:化学元素和人体健康六大营养素化学图标家庭小实验、趣味实验
题型:选择题

单词拼写。

      根据下列句子及所给汉语注释,在句子右边的横线上写出空缺处各单词的正确形式。

(每空只写一词)

1. When the queen is at home,the flag would be raised on top of her _____(宫殿).

2. The two friends _____(分享)all that they had when they were studying abroad.

3. Few students in my class can _____(付得起)a trip to New Zealand.

4. Oliver was unable to give police a _____(描述)of his attacker.

5. You will be better accepted if you can speak more _____(自然地)in public.

6. The little girl got _____(分开)from the group in the dark.

7. The day after _____(圣诞节)is called Boxing Day.

8. Auention please,the game will begin _____(立刻).

9. They finished _____(测量)that piece of land last week.

10. The international _____(烟草)industry is making a lot of money from the developing countries.

题型:选择题

下面每组中的两个数,和是321的是[ ]

A.214    525

B.157    164

C.99      32

D.235    67

题型:选择题

放在水平地面的水桶重300N,小明用260N的力向上提它,水桶不动,则水桶受到的合力大小为   [ ]

A. 560N

B. 260N

C. 40N

D. 0N

题型:选择题

稳定型心绞痛伴发缺血性心肌病X线检查可见()

A.肺间质片状阴影

B.心影增大

C.主动脉弓突出

D.肺纹理增粗

E.肺充血

题型:选择题

简述全球合作原则。

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