支原体肺炎属于（） A．浆液性炎 B．化脓性炎 C．纤维素性炎 D．间质性肺炎

若正方形的面积为16cm²，则正方形对角线长为（       ）cm。

--- Mum,_______ of the apples ______ gone bad.

---- We'd better eat up the as soon as possible.

A．one third;have

B．one thirds; have

C．one third;has

D．first three ;has

1.8米=______厘米350千克=______吨．

You shouldn't have ________ an appointment with her that you couldn't ________.[ ]

A．made，make  

B．kept，keep

C．made，keep  

D．kept，make