小麦条锈病病害循环包括以下（）等4个环节。
A.越夏
B.秋苗感染
C.越冬
D.春季流行
E.秋季流行
参考答案：A, B, C, D
He bought a book with the _____ 50 dollars and then his money _____.[ ]
A. remaining; ran out of
B. remaining; was used up
C. remained, ran out
D. remained, gave out
下列物质中，不能用作抗酸药的是。
A．氢氧化铝
B．氢氧化钠
C．碳酸镁
D．碳酸氢钠
