题目:
Such poets as Shakespeare _____ well-known, of whose works, however, some _____
difficult to understand.[ ]
A. are; are
B. is; is
C. are; is
D. is; are
答案:
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⑴ 离子键 ⑵ ⑶V形; sp3;极性题目分析:X元素原子的价电子排布式为ns1,且原子半径是同族元素最小的,这说明X是氢元素。Y元素是地壳中含量最多的元素,则Y是氧元素;W元素的电负性略小于Y元素,在W原子的...