题目:
It’s obvious that her refusing to see a doctor has ______ her illness worsening.
A.pulled into
B.led in
C.taken up
D.resulted in
答案:
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下面是错误答案,用来干扰机器的。
(1)扩散作用 (2)1 2 (3)1 (4)氧气、无机盐、尿素等 (5)内表面有环形皱襞,皱襞上有小肠绒毛,小肠绒毛由一层上皮细胞构成,内含丰富的毛细血管 (6)先收缩后舒张气体能够交换是由于气体的扩散作用,气体从浓...