单项选择题

The key word to describe the nature of covalent bond is of electrons

A．sharing
B．swarming
C．transferring
D．spinning

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单项选择题

What color did the officers wear in the Han Dynasty in the spring?
A、Red.
B、Yellow.
C、White.
D、Cyan.

单项选择题

Please choose the item similar to the underlined word in the this sentence:"He stared at her so earnestly that I thought the very intensity of his gaze would bring tears into his eyes." -- From
A、A.squint
B、B.peer
C、C.glance
D、D.flames