以下哪一个是双层单位膜结构（）。 A.细胞膜 B.核膜 C.溶酶体 D.

在氯化物检查中，反应溶液需在“暗处”放置5分钟后再比较浊度，目的是（ ）

A．避免碳酸银沉淀生成

B．避免单质银析出

C．避免氯化银沉淀生成

D．使生成的氯化银沉淀溶解

E．避免氯化银沉淀析出

Why is pink or purple a color for girls and blue or brown for boys?

The answer depends largely    小题1:   cultural values as well as personal experiences. To the Egyptians, green was a color   小题2:  represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. During the Spring Festival in China, children    小题3:  (give) money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect   小题4:  against evils（灾祸）.

People’s    小题5:(choose) of colors is also influenced by their bodies’ reactions toward them. Green is said to be   小题6:  most restful color. It has the ability to reduce pain and relax people both mentally    小题7:  physically. People    小题8: (work) in green environment have been found to have fewer stomach aches.

Red can cause a person’s blood pressure to rise and increase people’s appetites（食欲）. Many decorators will include different shades of red in the restaurant. And many commercial websites will have a red “Buy Now” button because red is a color that    小题9: (easy) catches a person’s eye.

Blue is another calming color. Unlike red, blue is believed to cause people to lose appetite. So   小题10: you want to eat less, some suggest that eating from blue plates can help.

在检测网络故障时使用的ping命令是基于（）协议实现的。

A．SNMP（简单网络管理协议）

B．FTP（文件传输协议）

C．IGMP（互联网组管理协议）

D．ICMP（互联网控制管理协议）

从修辞角度选出分析正确的一项（）。
忽然在前方，或是晨曦出来的东方，或是晚霞跌落的西方，或是风沙滚滚的北方，或是热浪升腾的南方，跳出一片红光，似霞朵，似火焰，似红旗，似一个彩色的梦……它就是红柳，沙漠上的灌木丛。

A．上面一段话运用了排比、比喻的修辞方法，写出了红柳生长的地点及属性。

B．上面一段话用了排比、比拟的修辞方法，写出了红柳生长的地带及习性，

C．上面一段话运用了排比、拟人、比喻的修辞手法，既写出了红柳生长的环境，又突出了红柳的特点。

D．上面一段话运用了排比、拟人、比喻的修辞手法，既描绘了红柳的特点，又渲染了周围的气氛。

纸绝缘电缆（）和塑料电缆接续。

A.不能

B.可以

C.加电容接续

D.加电阻接续