南戏最早是（）一带的地方戏，故又称之为（）或（）。

如果利用如图所示的电路来测量一个大电阻R的电功率，那么x、y、z应分别代表（　　）

A．电流表、电压表、滑动变阻器

B．电压表、电流表、滑动变阻器

C．滑动变阻器、电流表、电压表

D．电压表、滑动变阻器、电流表

— It's time for dinner, Linda. Let's ________ out this evening.

— Nice. But I prefer Chinese food _______ western food.

A．eat; to

B．to eat; than

C．eat; than

D．to eat; to

Scientists in Israel have discovered a new way to test for water pollution by "listening" to what the plants growing in water have to say．By shining a laser beam(激光束) on the tiny pieces of algae(海藻) floating in the water, the researchers said they hear sound waves that tell them the type and amount of pollution in the water．

"It is a red light, telling us that something is beginning to go wrong with the quality of water," said Zvy Dubinsky, an aquatic biologist at Israel's Bar Ilan University．"Algae is the first thing to be affected by a change in water quality．"

As water sources deteriorate worldwide, the testing of algae could be used to monitor water quality faster, more cheaply and more accurately than techniques now in use, Dubinsky said．The secret is to measure the rate of photosynthesis(光合作用) in the algae, meaning the plant's ability to transform light into energy．During photosynthesis, plants also release oxygen into the air．

Dubinsky's technique is easy to perform because of the over-abundance of algae in the planet's water．Most of the oxygen in the atmosphere comes from algae．A prototype tester shoots a laser beam at water samples to stimulate photosynthesis in the algae．But not all of the laser's heat is used．

Depending on the condition of the algae and the rate of photosynthesis, some of the heat is shot back into the water, creating sound waves, Dubinsky said．With a special underwater microphone, researchers are able to analyze the strength of the sound waves and determine the health of the algae and the condition of the surrounding water．

"Algae suffering from lead poisoning, like waste discharged from battery and paint manufacturing plants, will produce a different sound than those suffering from lack of iron or exposure to other toxins," said researcher Yulia Pinchasov．

72．To study water quality, scientists choose algae mainly because       ．

A．algae is most easily affected by pollution

B．most oxygen is produced by algae

C．the amount of algae is decreasing

D．algae is a kind of plant floating in the water

73．When Dubinsky studied water quality, he mainly focused on       ．

A．the amount of laser used by algae

B．the rate of photosynthesis in the algae

C．the condition of the algae

D．the heat of laser used by algae

74．After the study, scientists proved that       ．

A．the increase in population is caused by lack of water

B．global warming causes water resources to reduce worldwide

C．algae can show the type and amount of pollution in the water

D．algae is dying out in the ocean around the world

75．What would be the most suitable title for the passage?

A．Water pollution is reduced with the growth of algae

B．Pollution makes it hard for plants to make photosynthesis

C．Water pollution affects the growth of marine plants

D．Scientists listen to plants to find pollution

优秀文化对人的发展有重要的影响，它能够[ ]

①促进社会全面进步

②丰富人的精神世界

③增强人的精神力量

④促进人的全面发展

A、①②③

B、①②④

C、①③④

D、②③④

现代化的生产和管理，要求劳动者不仅要以体力和经验为基础，更重要的是以智力和知识为基础。即使传统的产业部门，由于微电子和自动化技术的渗入，也促使原来由普通劳动者承担的大量劳动，转变为由工程技术和管理人员来承担。从中可得出( )

A．我国现已不需要传统产业

B．现代化生产已不需要劳动者的体力经验

C．社会的发展在任何时候也离不开体力劳动者

D．现代社会经济和科技发展要求人应得到全面发展