藻类植物都非常小，观察它们时，通常都要借助于显微镜。 [ ]

实验桌上摆放着甲“220V 25W”、乙“220V 300W”、丙“220V 500W”三只灯泡,小芳同学从中任选一只,正确使用多用电表测量它的阻值,如图所示,其测量值为____ Ω，她选用的是      灯泡(填“甲、乙或丙”),测量时流过灯泡的电流是从      流向      (填“a或b”)。

当房地产开发投资者将建成后的房地产用于出售、出租或经营时，其投资均属于长期投资。（）

in order to know a foreign language thoroughly(完全地), four things are necessary. Firstly, we must understand the language when we hear it spoken. secondly, we must be able to speak it ourselves, with confidence(自信) and without hesitation(犹豫). Thirdly, we must do much reading. Finally, we must be able to write it. We must be able to make sentences that are correct in grammar.

There are no shortcuts to succeed in language learning. A good memory is a great help, but it is not enough only to memorize the rules from a grammar book. it is not much learning by heart long lists ( 一览表 ) of words and their meanings, studying the dictionary and so on. We must learn by using the language. If we are pleased with a few rules we have memorized, we are not really learning the language. We must "learn through use". Practice is important. We must practice speaking and writing the language whenever we can.

小题1: the most import things to learn a foreign language are

A．understanding and speaking

B．listening,speaking,reading and writing

C．writing and understanding

D．memorizing and listening小题2: Someone hears and writes English very well, but he speaks it very badly. This is because_____________.

A．he doesn’t understand the language when he hears it spoken

B．he doesn’t have a good memory.

C．he always remembers lists of words and their meanings

D．he often hesitates to practice speaking it.小题3: Which is the most important in learning a foreign language?

A．a good memory.

B．speaking.

C．practice.

D．writing.小题4: “Learn though use” means___________.

A．we use a language in order to learn it

B．we learn a foreign language in order to use it

C．we can learn a language well while we are keeping using it

D．both b and c.

某省调查城镇交通状况，得到现有城镇道路统计表，表中列出了每条道路直接连通的城镇。省政府“畅通工程”的目标是使全省任何两个城镇间都可以实现交通(但不一定有直接的道路相连，只要互相间接通过道路即可)，并要求增设的道路条数为最少，要解决这个问题，问：

根据《反间谍法》，对国家安全机关反间谍工作表述错误的是（）。

A.在危害国家安全的情形消除后，国家安全机关应当及时解除查封、扣押

B.查验中发现存在危害国家安全情形的，国家安全机关应当责令其整改

C.在危害国家安全的情形消除后，国家安全机关还可以继续查封、扣押

D.拒绝整改或者整改后仍不符合要求的，可以予以查封、扣押