下列物质露置于空气中，质量减少的是
A．烧碱
B．浓盐酸
C．生石灰
D．石灰水
答案：B
浓盐酸有挥发性
下列药物中，不属于兴奋剂的是（）
A.利尿剂
B.精神刺激剂
C.钙通道阻断剂
D.β受体阻断剂
E.蛋白同化制剂
用括号内所给单词的适当形式填空
1. —Where ________(be) the backpacks?
—They are on the sofa.
2. Bruce only __________(watch) sports on TV!
3. —What's your ________(one) name?
—Mike.
4. Please take these _________(thing) to your brother.
5. Look at the boy. _______(he) father is a teacher.
se take these _________(thing) to your brother.