被称为德国“黄金水道”的河流是（）
A.多瑙河
B.莱茵河
C.易北河
D.威悉河
参考答案：C
As a teacher, he is ______ to work hard and must be strict in his work.
A．expected
B．known
C．hoped
D．suggested
甲数分解质因数是2×3×5，乙数分解质因数是3×5×7，甲乙两数的最小公倍数是______．
