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【单选题】
检查重金属时,为消除供试液颜色的干扰,可加入A.
稀焦糖溶液
B.
维生素C
C.
氯化钠
D.
稀盐酸
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I don ' t think there is ______in the book on the desk. [
A.
] something important [
B.
] anything important [
C.
] important something [ D] important anything
【单选题】He can’t tell us ________, I think.
A.
important anything
B.
anything important
C.
important something
D.
something important.
【单选题】.Jennifer didn’t attend the important conference,and that’s _________she hadn’t been gotinformed of it.
A.
why
B.
the reason
C.
because
D.
for
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