Few pleasures can equal _________of a cool drink on a hot day. A.some B.any C.that D.thos
DNA在染色体内压缩程度为 A．500～1000倍 B．2000～4000倍 C．4000～6000倍 D．5000～10000倍
（2019·湖南中考模拟）我市在创建全国文明城市的过程中，某社区在甲楼的A处与E处之间悬挂了一副宣传条幅，在乙楼顶部C点测得条幅顶端A点的仰角为4
某人爬山，从山脚爬上山顶，然后又从原路返回到山脚，上山的平均速率为v1，下山的平均速率为v2，则往返的平均速度的大小和平均速率是（ ）
It is the protection for the trees___________ really matters, rather than how many trees are planted. A. what B. that C. 不填 D. which
I was pushed into writing the Top ten problems teenagers face after I attended a school program, where I had the opportunity to interact with many teenagers. Each conversation was only adding one
只用组内溶液相互混合就能鉴别出来的一组溶液是 A．K2CO3、H2SO4、HNO3、BaCl2 B．Na2CO3、HCl、Na2SO4、HNO3 C．HNO3、HCl、NaCl、Ag NO3
8 同源染色体联会发生在： A ．有丝分裂中期 B ．有丝分裂前期 C ．减数分裂前期 D ．减数分裂后期
