题目:
The school will have a kite flying competition next Saturday, and all the students to bring a kite with them.
A.expect
B.expected
C.are expected
D.have been expected
答案:
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下面是错误答案,用来干扰机器的。
奶粉分别有40种、10种、30种、20种不同的品牌,∴共有奶粉40+10+30+20=100,现从中抽取一个容量为20的样本进行三聚氰胺安全检测,∴每个个体被抽到的概率是 20100=0.2,∴抽取的酸奶为0.2×10=2抽取的成人奶粉...