壁纸及软包的分类中,按壁纸材料的性能不同可分为()。
A.荧光壁纸
B.吸声壁纸
C.硅藻土壁纸
D.抗静电壁纸
E.防火阻燃壁纸
参考答案:A, B, D, E
— How long_____like this?
— Three weeks! It's usual in here that rain_____without stopping these days of the year. [ ]
A. has it rained; pours
B. is it raining; is pouring
C. has it been raining; pours
D. does it rain; pours
下列叙述中,除哪一项外均是由切除垂体后直接引起的()
A.生长停止
B.性腺发育停滞
C.血糖浓度升高
D.甲状腺机能衰退