胰岛素瘤（）
A.血清AFP升高
B.血清胰岛素升高
C.血清促胃液素（胃泌素）升高
D.血糖升高
E.血清淀粉酶升高
参考答案：B
On stepping into the room this morning, I was astonished to find the floor covered with _______ looked like tiny insects.
A．that
B．what
C．where
D．when
