One of the features of REM sleep is that______.

舌组织有缺损时缝合创口要尽量保持舌的长度，将创口前后纵行方向进行缝合

如缺损较大，必要时可将舌尖向后折转缝合

舌侧面及邻近牙龈和口底黏膜均有创口而又不能同时关闭时，应先缝合舌的创口

应用粗针粗线缝合

进针处应距创缘较远，缝合要深一点

ようで

そうで

かのように

みたいで 　　　

とてもとれそうにありません

必ずとらなければなりません

いつかとれるでしょう

ぜひとりたいです

とともに

に加えて

につれて

をもとに 　　　

食べざるをえない

食べるのはよくない

食べるのがいい

食べたくてたまらない 　　　

に対して

によって

について

にとって

でも

だけ

さえ

より

决策阶段

设计阶段

招标阶段

施工阶段

A new kind of radar has been developed for spaceship travelers. A working laboratory model of a new system of radar that makes use of a beam of light is said to be ten thousand times more accurate than the best comparable system of radar that used microwaves.

The model has shown that this radar system, known as laser-doppler radar, can measure with absolute precision speeds varying from spaceship orbital injection (进入) velocities (速度) of five miles per second down to virtual stops--speeds of less than one ten thousandth of an inch per second. According to the scientists who are developing this system, such fine measures of velocity are of prime importance in space missions. In a rendezvous (对接) between two spaceships, or in a landing approach by a vehicle onto an orbiting space station, a bump could rip open a ship’s skin, or a nudge could knock the station out of its orbit.

The light-beam radar, which operates at a frequency of trillions (百万兆) of cycles per second, could easily detect and measure the movement of a vehicle edging up to a satellite space station. A control system using so precise a signal as this would allow a huge vehicle to dock at a space station as lightly as a feather.

すぎて

ためで

わけで

あまり