常温下,下列金属既不跟浓硫酸反应,又不跟盐酸反应的是[ ]
A、Fe
B、Al
C、Mg
D、Cu
答案:D
—Physics is an important subject, isn’t it ?
—Yes. ________it well and you’ll find it useful in your daily life.
A.Learning
B.Learn
C.Learned
D.To learn
下列药物中,哪一味是收敛止血药()
A.仙鹤草
B.三七
C.小蓟
D.地榆
E.白茅根