搜题请搜索小程序“爱下问搜题”
问题 单项选择题

人们对未来的预测，应该这样认识（）。

①它是人脑对客观事物的反映

②它根源于现阶段的客观事物

③它有正确和错误的区别

④它属于人脑对客观事物的反映形式

A.①②③

B.①③④

C.①②④

D.②③④

答案

参考答案：B

问答题

用NaCl固体配制溶质的质量分数为10%的NaCl溶液时，下列情况会造成溶液中溶质的质量分数偏大的是（　　）

A．将用于搅拌的玻璃棒用蒸馏水冲洗，洗涤液并于溶液中

B．量取水的体积时仰视读数

C．将NaCl固体放在托盘天平的右盘中称量

D．将用量筒取的水倒人烧杯时，有少量水溅出烧杯
查看答案
听力题

小题1:Morning exercises help us get___________(准备好)for the day.

小题2:What about__________(购物) in the supermarket at the weekend?

小题3: I know you are _____________ (成员) of the Football Club.

小题4:Who _____________(其他)wants to play volleyball with us?

小题5:They _____________(确实) have a wonderful time in the park.

小题6: When does the ____________ (parent) meeting begin in the afternoon?

小题7: Please give my best ______________ (wish) to your friend for me.

小题8:The boy often              (fly) a kite in the park.

小题9:Simon is one of the best basketball           (play) in our school.

小题10:__________ (be) the boys good at dancing?
查看答案