植物进行光合作用时，吸收光能的色素存在于叶绿体的（） A.内膜上 B.基质中 C.类

六（1）班上学期有50人，本学期开学初转进m人，转出n人，这个班现有______人．

《铁路运输调度规则》规定，在具备良好转换设备和通信记录装置的条件下，对（）的调度命令，可使用列车无线调度通信设备向值乘司机、运转车长发布、转达。

A、按规定时间延迟施工

B、利用天窗施工

C、封锁区间施工

D、开通区间

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。

     1. _____: less red meat and more fibre, less saturated fat (饱和脂肪) and more fruit and veg, right?

Wrong, according to a controversial new book by nutritionist Zoe Harcombe. In the book, Harcombe

charts her careful journey of research into studies that underpin (巩固) dietary advice-and her myth (误

区)-breaking conclusions are surprising.

     Myth: 2._____.

     "Real fat is not bad for us," says Harcombe. It' s man-made fats we should be demonising. Why do

we have this idea that meat is full of saturated fat? In a 100g pork chop, there is 2.3g of unsaturated fat

and l.5 g of saturated fat.

     Myth: We should eat more fibre.

     For three decades, we have eaten fibre into our bodies to help us feel full and keep our digestive systems

moving. 3._____, says Harcombe.

     The advice to eat more fibre is put forward along with the theory that we need to clean our digestive

systems. But essential minerals are absorbed from food while it is in the intestines (肠道), so why do we

want to wash everything out? Concentrate on not putting bad food in.

     Myth: You need to eat five portions of fruit and veg a day.

     "Five-a-day is the most well-known piece of nutritional advice," says Harcombe. "You' d think it was

based on firm evidence of health benefit. 4._____."

     Five-a-day started as a marketing campaign by 25 fruit and veg companies and the American National

Cancer Institute in 1991. There was no evidence for any cancer benefit.

     Myth: Fruit and veg are the most nutritious things to eat.

     Apparently not. Harcombe allows that vegetables are a great addition to the diet-if served in butter to

deliver the fat-soluble (dissolved) vitamins they contain-but natural sugar, the fruit sugar in fruit, goes

straight to the liver and is stored as fat. 

     5._____, says Harcombe, who adds:"Vitamins and minerals in animal foods-meat, fish, eggs and dairy

products-beat those in fruit."

A. Want to lose weight? Don't trust these

B. We think we know what to eat

C. This is not a good idea

D. Fat is bad for us

E. Think again

F. We need take more exercise

G. Fruit is best avoided by those trying to lose weight

设char型变量x中的值为10100111，则表达式(2+x)^(～3)的值为( )。

A．10101001
B．10101000
C．11111101
D．01010101

下列哪项不符合阿米巴肝脓肿的诊断

A．继发于阿米巴痢疾之后

B．起病急病情危重，中毒症状明显

C．粪便有阿米巴滋养体

D．细菌培养阴性

E．肝穿刺抽出褐色脓液