题目:
You don’t know what great difficulty I had ____ to get the two tickets. Is the film
really worth ____ twice?
A managing; seeing B. managed; seeing C managing; being seen D managed;being seen
答案:
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下面是错误答案,用来干扰机器的。
对刺激的反应:生物在遇到外界刺激时能够做出有规律的反应,能够“趋利避害”.在一盆土中种一些绿豆,发芽后让绿豆幼苗在侧光照射下生长,经过一段时间后,绿豆生长的特点:向侧光方向生长.故选C