[填空题]Calcium permits cells to divide, regulates muscle contraction and relaxation, and plays an important role in the movement of protein and nutrients inside cells besides helping ______ .

[填空题]Calcium permits cells to divide, regulates muscle contraction and relaxation, and plays an important role in the movement of protein and nutrients inside cells besides helping______.

[简答题]When you start running，the muscle cells bum off the ATP they have floating around in______.

[简答题]S2. In general, cancer cells divide at a higher rate than do normal cells, but the distinction between the growth of cancerous and normal tissues is not so much the rapidity of cell division in the former as it is the partial or complete loss of growth restraint in cancer cells and their failure to differentiate into a useful, limited tissue of the type that characterizes the functional equilibrium of growth of normal tissue.

[单项选择]We can’t see the cells of muscle with （）eyes.
A. bald
B. bare
C. nude
D. naked

[单项选择]
If you are an international tourist in the Unites States of America, with a valid T-9 tourist visa, the government will allow you to study any course offered by a recognized university or community college within the area or region you have indicated as’ your location of stay. Courses must not exceed four months in length and must be paid for in full upon registration.
To apply for this special study permit, visit an Immigration office located in any major city along with your passport, including your T-9 visa, an official letter of registration from your institution’s registrar’s office, one passport size photo as well as $50 for administration fees.
Temporary study permits will be processed within 2 days.
Immigration Office
United States of America
What is this notice mainly about
A. Instructions on how to immigrate to the US
B. How to obtain legal papers to study in the US
C. T-9 visa regulations
D. International tourist duties to the government

[单项选择]Cancer cells destroy not only all rival cells, in their ruthless biological warfare, but also destroy the larger organization—the body itself—signing their own suicide warrant.（　）
A. refined
B. random
C. merciless
D. perpetual

[单项选择]Fat cannot change into muscle_______muscle changes into fat.
A. any more than
B. no more than
C. no less than
D. much more than

[填空题]cause to be apart; divide

[单项选择]A "Backgrounder" permits newspapermen to publish information given them though without attribution to the source.
A. a person who remains behind the scene
B. a person providing the background knowledge
C. a press conference
D. a news agency

[单项选择]As a medium of exchange, money permits the separation of exchange into the two distinct acts of buying and selling, without requiring the seller to purchase goods from the person who buys his products, or vice versa. Hence producers who know they will be paid in money, can concentrate on finding the most suitable outlet (销路) for their goods, while buyers who will pay in money, can concentrate on finding the cheapest market for the things they wish to purchase. Specialization, which is vital to an advanced economy, is encouraged, because people whose output is not a complete product but only a part of one in which many others are involved can be paid an amount equivalent to their share of the product.
Another advantage of money is that it is a measure of value—that is, it serves as a unit in terms of which the relative values of different products can be expressed. In a barter economy it would be necessary to determine how many plates were worth one hundred weight of cotton, or how
A. this would need years of practice
B. coal, for example, would lose its value
C. they could not be stored for years on end
D. many products would lose their value