No photos. No smoking. Keep quiet.
Don't play with fire. Look out for children. Wet floor.
Look out for animals. Don't walk on the grass. No dogs.
①____ ②____ ③____ ④____ ⑤____ ⑥____ ⑦____ ⑧____ ⑨____
①核糖体②线粒体③内质网④高尔基体⑤叶绿体.
冬冬同学站在平面镜前3m处,她的像到镜面距离为 ____ m;现将一块和镜面一般大的木板放在镜子后面1m处.如图所示,这时她 ____(选填“仍能”或“不能”)在镜中看到自己的像 。
①____ A.read B.play C.book ②____ A.Friday B.Wednesday C.birthday
③____ A.sports B.Monday C.Friday
④____ A.weekend B.science C.music
⑤____ A.maths B.often C.Chinese
125厘米=____分米____厘米