下列哪项不是亚急性细菌性心内膜炎的心脏并发症（） A.冠心病 B.房室传导阻滞 C.

"X"型腿属于 |

A.佝偻病活动期表现

B.佝偻病早期表现

C.手足搐搦症隐性体征

D.手足搐搦症常见体征

E.维生素D中毒

阅读理解

     BUKHANNON, West Virginia- Two rescue teams slowly moved along a two-mile path in Monday

night to the site of a coal mine explosion that trapped 13 miners, who had not been heard from since the

early morning accident.

     Meanwhile, at a nearby church, more than 250 family members and friends gathered, waiting for

updates(最新报道) on the rescuers' progress.

     The miners were trapped at about 6:30 a.m. and many families weren't informed of the accident until

about 10 a.m.-more than three hours after it happened. "It's very upsetting, but you've got to be patient, I

guess," said John Helms, whose brother, Terry, was trapped in the mine.

     The trapped miners were about 260 feet underground and about 10000 feet from the Sago Mine's

entrance, said Roger Nicholson, general counsel from International Coal Group.

     At a late night news conference, Nicholson said one team had advanced about 4800 feet in the four

hours since entering the mine just before 6 p.m. Another team entered the mine about 30 minutes later.

     He said the crew was very experienced, with some members having worked underground for 30 to 35

years. The miners were equipped with about one hour of breathable oxygen each. The company has not

released the names of the miner.

     The teams test the air about every 500 feet, and have to disconnect (remove) the power to the phones

they use to communicate with the surface before doing that. "We don't want to be energizing anything if it's

in an atmosphere with burnable gases," Kips said.

     The cause of the explosion was not immediately known. High level of carbon monoxide were detected

shortly after the explosion, which delayed rescue efforts, but those levels have since subsided(减退),

authorities said.

1. According to the passage, we can infer that _____.      

A. all the miners who were trapped underground were still alive

B. communication with the trapped miners was cut off

C. the two rescue teams entered the mine at the same time

D. the rescue started as soon as the accident happened

2. If the first team advanced at an average speed, they could dig about _____ per hour.

A. 1000 feet                          

B. 2400 feet

C. 1200 feet                          

D. 4800 feet

3. Where can the passage be seen?

A. In a magazine.                      

B. In a newspaper.

C. In a science book.                  

D. In an advertisement.

（）抑制剂不改变酶促反应Vm；（）抑制剂不改变酶促反应Km值。

转速高、回转精度高，宜选用球轴。

PowerDesigner中ProcessAnalyst模块的主要功能是

A．提供了对PowerDesigner所有模型信息的只读访问

B．用于数据分析和数据发现，可描述复杂的处理模型

C．用于数据仓库和数据集市的建模和实现

D．用于物理数据库的设计和应用对象及数据组件的生成