The topic of the passage is that __.

A．the control of population is essential to the development of a nation

B．natural resources are important to the economic development of a country

C．awareness of the effects of man's actions is as important as population control

D． developed countries should do more to protect natural environment on the earth

[单选题]The topic of this passage would probably be_______．A．The Magic Power of QigongB．Acupuncture and QigongC．Qigong--Superstition or ScienceD．Famous Qigong Masters

[单选题]On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?A．Deleting unusable addresses through the creation of many subnets.B．Combining routes to multiple networks into one supernet.C．Reclaiming

[单选题]What is the main topic above paragraph? （）A . Logistics must be globalizationB . Logistics is developingC . Logistics needs all nations involved in the worldD . Logistics activity is international

[主观题]F．irstly, we should read the topic c and organize our ideas. 77.

[单选题]We have already covered the topic of network addresses. The first(71) in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a (72)

[单选题]What is the author’s attitude towards the topic?A.Critical．B.Objective．C.Bi

[单选题]We tried to [restrict]our conversation to arguments relevant to the topic.A

[单选题]We tried to [restrict]our conversation to arguments relevant to the topic.A

[单选题]The main purpose of asking questions about the topic before listeningis to

[单选题]The main purpose of asking questions about the topic before listening is to