单项选择题

下列武器哪些是近战武器？①122加农炮②迫击炮③武装直升飞机④机枪⑤反坦克导弹⑥轰炸机。（）

A.①②④
B.②④⑤
C.②⑤⑥
D.①③⑥

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单项选择题

“… they were ready to toss back and forth, like a ball, the latest rumors going around the village. ” (Para.21)In the above sentence, the italicized part is a metaphor.( )

多项选择题

既能溶于Na2S又能溶于Na2S2的硫化物是

A．Bi2S3
B．As2S3
C．GeS
D．PbS