What happens to nitrogen in body tissues if a diver ascends too quickly?

A．) It forms bubbles.

B．) It goes directly to the brain.

C．) It is reabsorbed by the lungs.

D．) It has a narcotic effect.

[单选题]What happens in the end to the water from Lake Ontario?A.It is used by the

[单选题]What feature of “body language”mentioned in the passage is common to both humans and animals?A．Lifting beads when sad.B．Keeping long faces when angry.C．Bristling hair when ready to attack.D．Bowing heads when willing to obey.

[单选题]Which of the following tissues based strictly on spindensity should appear the darkest? ( )A . fatB . muscleC . waterD . bone

[名词解释] 氮循环 nitrogen cycle

[名词解释] 固氮基因 nitrogen fixation genes

[名词解释] 有机氮库 organic nitrogen pool

[填空题] 英译中（Translate）：biological nitrogen fixation（）

[名词解释] 联合固氮作用 associative nitrogen fixation

[主观题]D．o stay at home，whatever happens．（改为同义句）D．o stay at home，______ ______ ______happens．

[名词解释] 反应性氮中间产物（reative nitrogen intermediates，RNIs）