关于黄河断流，院士专家考察组在结束考察后提出，政府应利用经济杠杆促进水资源的高效

5岁小儿按公式计算身高、体重及头围约是（）

A.9.0cm、12kg、44cm

B.95cm、14kg、46cm

C.100cm、16kg、48cm

D.105cm、18kg、50cm

E.110cm、20kg、52cm

句型转换。

1. When I grow up, I want to be an artist.（对画线部分提问）

              do you want to ____ when you grow up?

2. John needs to cut his hair because his hair is too long.（改为同义句）

    John needs to ____ his hair        because of his long hair.

3. After planting the trees you should water them often.（改为同义句）

    The trees                           often after they_______    __________.

4．Tim likes Chinese. So does Rose.（将两句合并为一句）

             Tim        Rose ____ Chinese.

5. Lucy doesn't seem to have many friends here.（改为同义句）

                                   Lucy doesn't have many friends here.

液压盘式刹车由刹车盘、刹车钳、（）和控制系统等组成。

A、液压动力钳

B、安全钳

C、工作钳

D、开式刹车钳

常与熔点较高的蜡类制成稠度适宜的基质的是（）

A.麻油

B.羊毛脂

C.液状石蜡

D.硅酮类

E.蜂蜡

小李开了一个多小时会议，会议开始时看了手表，会议结束时又看了手表，发现时针与分针恰好互换了位置。问这次会议大约开了1小时多少分？（）

A．51

B． 47

C．45

D． 43