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【单选题】
某有机物结构 下列说法不正确的是 [     ]
A.
该有机物属于烷烃
B.
该烃的名称是3,5 -二甲基
C.
该烃与2-甲基-3-乙基己烷互为同分异构体
D.
它的最简单的同系物二氯代物有两种
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【单选题】关于补体的生物学活性,下列哪一项是错误的
A.
具有溶菌、杀菌作用
B.
具有免疫调理作用
C.
具有免疫粘附作用
D.
具有趋化功能
E.
能促进抗体大量合成
【单选题】关于补体的生物学活性,下列哪一项是错误的()
A.
具有溶菌、杀菌作用
B.
具有免疫调节作用
C.
具有免疫黏附作用
D.
具有趋化功能
E.
能促进抗体大量合成
【单选题】This is the reason _______ he was absent.
A.
that
B.
which
C.
why
D.
what
【单选题】关于补体的生物学活性,下列哪一项是错误的
A.
具有溶菌、杀菌作用
B.
具有免疫调理作用
C.
具有免疫黏附作用
D.
具有趋化功能
E.
能促进抗体大量合成
【单选题】This is the reason __ he is leaving now.
A.
as
B.
which
C.
why
D.
what
【单选题】This is the reason ___ I agree to it.
A.
that
B.
why
C.
what
D.
A and B
【简答题】This is the reason. We need to make joint efforts to combat the disease for this reason.
【单选题】This is the reason ______ he didn't come to the meeting.
A.
in which
B.
with which
C.
that
D.
for which
【简答题】This is the reason ________ he was absent. This is the reason _______ can explain his absence.
【单选题】This is the reason ______he didn't come to the meeting.
A.
in which
B.
for which
C.
that
D.
with which
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