从同一植株挑选长势相同、重量相等的三片叶片，编号①、②、③．将①烘干称重得a，②放人盛有清水的烧杯中并置于适宜光照下，③放入盛有清水的烧杯中并置于黑暗处．在适宜温度下，向水中通入空气，6小时后取出②和③叶片，烘干称重分别得b和c．叶片在6小时内通过光合作用制造出的有机物量是（   ）

    Hi everyone! Good news. A book sale.____will people drive cars in space? Will you meet traffic ____? You'll get answers from our books. Are ____ interesting for you? They can do heavy work. You ____enjoy short working hours. We've got some storybooks about them. What's the best way to buy products at very good prices? Our books will tell you something about online ____? 

    Welcome to the playground this Saturday.

    Have a nice day!

一问：这个数最大是____?

二问：这个数最小是____?

填入下面文段空白处的词语，最恰当的一组是（    ）

    我在十八日早晨，才知道上午有群众向执政府请愿的事；下午便得到噩耗，说卫队①开枪，死伤至数百人，而刘和珍君即在遇害者之列。但我对于这些传说，②至于颇为怀疑。我③是不惮以最坏的恶意，来推测中国人的，④我还不料，也不信竟会下劣凶残到这地步。况且始终微笑着的和蔼的刘和珍君，更何至于无端在府门前喋血呢？

    ⑤即日证明是事实了，作证的便是她自己的尸骸。还有一具，是杨德群君的。而且又证明着这不但是杀害，⑥是虐杀，因为身体上还有棍棒的伤痕。