肝癌的MRI征象有哪些?

A recent survey show that most students often communicate with our parents. But there are still some think it embarrassing to share their ideas with them. Actually everyone should attach importance to family communication. It can be strengthen the bond of the whole family or bridge the gap between children and parents. Besides, share your personal problems and emotions will greatly help reduce the pressure on you and build up your confidence. As for my family, we had a special dinner together every Saturday evening, over that everyone takes turns to share one problem. Then others try to suggest solutions. In this way the whole family can enjoy every single bit of life. I think my family will stick out the tradition forever.

溶菌酶(血清或尿)测定，在下列哪项疾病变换显著

A．急性淋巴细胞白血病

B．急性粒细胞白血病

C．急性早幼粒细胞白血病

D．急性单核细胞白血病

E．急性红细胞白血病

形成西北地区降水少的主要原因（   ）

A．靠近海洋

B．远离海洋，高大山地对水汽的阻隔

C．季风影响强烈

D．高压控制

下列叙述从化学角度分析，其中不正确的是( )

A．由氮气为原料合成氨是氮的固定

B．向煤中加入生石灰可减少对大气的污染

C．氟里昂（CCl₂F₂）或NO_X都可破坏臭氧层而导致温室效应

D．HgCl₂的稀溶液可用于手术器械消毒，原因是HgCl₂可使蛋白质变性

安全生产监督管理部门和负有安全生产监督管理职责的有关部门逐级上报事故情况，每级上报的时间不得超过( )h。

A．2
B．3
C．4 D．5