既能补中益气又能养血安神的药物是（）
A.甘草
B.大枣
C.枣仁
D.柏子仁
E.西洋参
参考答案：B
—Excuse me, is this your gold ring?
—Yes, _______.[ ]
A. is it
B. it's
C. it is
D. it isn't
砌筑砂浆换算中（）不变
A.砂浆用量
B.人工费
C.机械费
D.材料费
