Somogyi现象是指()
A.胰岛素过量
B.清晨胰岛素反调节激素分泌不足
C.凌晨低血糖
D.清晨现象
E.慢性胰岛素不足
参考答案:A
Although police could be seen everywhere, they seemed to be searching the houses almost ________.[ ]
A. at ease
B. at random
C. at risk
D. at length
物质循环中,对物质转化不可缺少的两类生物是( )
A.绿色植物和分解者
B.绿色植物和动物
C.动物和微生物
D.动物和无机物