①他像过去那样认真选料。____

②父亲嫌那个下手不熟练，动作太慢。____

写作。

    春夏秋冬，四季各异。我们走过了生机勃勃的粉色的春天，我们走过了绿意盎然的绿色的夏天，我们走过了果实累累的金黄色的秋天，我们也走过了白雪皑皑的白色的冬天。那么，哪个季节让你停留下脚步不愿继续前行呢？ 请你以《我最喜爱的季节》为题，写一篇作文。要求：有条理，内容具体通顺，标点符号正确。

有关氧气和氢气的实验室制法，下列说法正确的是               (    )

为了得到函数$y=lg\left(\frac{-x+1}{10}\right)$的图象,可以将函数$y=lg\left(-x\right)$的图象（   ）

填空。

①You mustn't walk around during landing. ____   A. On a bus

②You mustn't talk to the driver.____         B. On a train

③You must wear a helmet .____          C. On a bike

④You must wear a seatbelt.____           D. On a car

⑤You mustn't put your head out of the window.____   E. On a plane

⑥You must wear a lifejacket.____       F. On a boat