A:森林可保持水土
B:蚯蚓疏松土壤
C:植物生长需要水
D:仙人掌叶特化为刺
—Yes, it is __________. It is new.
dāng
liáo
liǎn
dān
锐不可____
眼花____乱
屏息____声
____精竭虑
jiàn
jīn
dǐ
yān yān
油光可____
正____危坐
坦荡如____
____欲睡
生活中处处有化学,下列做法从化学的角度分析,不科学的是( )
1.2乘2.1的积加上10.5除以2.1的商,和是多少?
— So many problems! I'm too tired.— You should try to _____________ them by yourself. You're not a child any longer.