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搜题
【单选题】
血液凝固的最后阶段是（ ）A.
因子Ⅹ被激活
B.
凝血酶原激活物的形成
C.
纤维蛋白原变成纤维蛋白
D.
凝血酶原变成凝血酶
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皮皮学刷刷变学霸
举一反三
【单选题】The company had about 20 notebook computers but
A.
7. The company had about 20 notebook computers butonly one-third _______ used regularly. Now we have 60 working all daylong. （浙江） A.is
B.
are
C.
was
D.
were
【单选题】( 浙江卷 )7. The company had about 20 notebook computersbut only one-third _______ used regularly. Now we have 60 working all daylong. （ + 主谓一致）
A.
is
B.
are
C.
was
D.
were
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