水的硬度用pH值表示,一般要求pH值在()之间。
参考答案:6.5~7.5
“豆你玩”、“蒜你狠”、“姜你军”、“糖高宗”等网络热词备受人们关注。人们对绿豆、大蒜、生姜、白糖等商品的消费属于[ ]
①生存资料消费
②有形商品消费
③发展资料消费
④劳务消费
⑤享受资料消费
A、①⑤
B、①③
C、②④
D、①②
Maria ___________ at 6:30 this morning by her mother to get ready for school.[ ]
A. was woken up
B. woke up
C. is woken up