— I don't think you should use the dictionary too often while reading.
— _________, but sometimes I can't do without it.
A:Yes, I will
B:No, I won't
C:Yes, I should
D:No, I shouldn't
将左边和右边的匹配起来。
①Sit____ A. to music
②Listen____ B. a picture.
③Draw____ C. down.
将一洋葱细胞放入大于该细胞细胞液浓度的KNO3溶液中,一段时间后在显微镜下发现该细胞未发生质壁分离,其原因是可能该细胞( )
①是死细胞 ②大量吸水 ③是根尖分生区细胞 ④大量失水 ⑤质壁分离后又自动复原.
蚕吐丝在什么时期( )
“汉通西域,虽然起初是出于军事目的,但西域开通以后,它的影响远远超出了军事范围”。汉通西域最初的军事目的是什么?( )