单项选择题
A.must have killed
B.would have killed
C.should have killed
D.could have killed
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A.错误
B.正确
A.My pleasure.
B.It doesn’t matter.
C.No, thanks.
D.It’s Ok.
A.IEEE 802.15.1 Bluetooth 4.1
B.IEEE 802.11n WiFi
C.IEEE 802.15.4. Zigbee
D.IEEE 802.15.3
E.IEEE 802.11ah
A.My pleasure.
B.Never mind.
C.Quite right.
D.Don’t thank me.
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