A：6
B：7
C：8
D：9
A.Where did you go over the winter holiday?
B.How tall are you?
C.Did you see a film last night?
D.You didn't come to school. What happened?
E.Are you all right?
⑴____ ⑵____ ⑶____ ⑷____ ⑸____
将以下南亚主要农作物与其分布地区配对．
答：A配____，B配____，C配____，D配____．
物质
性质
用途
例：CO2（干冰）
易升华，吸收大量热
做制冷剂或人工降雨
____
中，
,
,
,则
的定义域为R，则实数k的取值范围是(
)
