下列做法哪个是错误的（）。A、在水浴上加热乙醚B、把浓硫酸缓缓倒入水中C、用湿润的收

任务型阅读.

      Lots of people like diving into water, because they can explore the underwater world. But there is

another kind of diving.  Some people dive into the sky! This is really a very exciting sport. A skydiver

goes high up in the air on a plane. Then he jumps off the plane and floats(飘)in the air with the help of 

a parachute(降落伞)．A parachute is like a huge umbrella.It is put on the back of the skydiver. When

the skydiver reaches a certain height, he will pull a string(细绳)and the parachute will open up in seconds

and carry him gently(轻轻地)down to the ground.  Skydivers like doing a lot of fascinate tricks in the

air.  After jumping off the plane one after another, they will try to stay in the air and hold each other's

hands. |They can form different shapes. Is it safe to do skydiving? Yes, as long as we receive right training. But sometimes, accidents do happen. In Canada, two skydivers were killed in 1991 when they jumped

off  the plane.  Because their parachutes got tied up with each other, the parachutes couldn't open up and

both crashed down and died.

1. Why do people like diving into water?

2. How does a skydiver go up into the sky?

3. What does a parachute look like?

4. Where does a skydiver put his parachute?

5. Why were two skydivers killed in Canada?

下列选项中，（）不是根据工作流程划分的布置形式。

A.产品布置

B.存储布置

C.工艺布置

D.定位布置

蓝莓的英文名称是（）。

A、Black berry

B、mango

C、Blue pear

D、Blue berry

35岁女性，月经不规律，3～7d/25～ 90d，原发不孕病史。最近因停经6个月，感觉 * * 胀痛、恶心、呕吐而就诊，尿妊娠试验阳性。对该孕妇推算孕周，以下哪种方法最可靠

A．测BBT
B．早孕反应的时间
C．早孕盆腔检查
D．首次尿妊免阳性时间
E．早孕B超测胚囊或胚胎大小

牵伸波