关于宫颈黏液结晶检查的临床应用，下列哪项错误（） A.指导避孕或受孕 B.诊断早孕

构成循环结构的语句有( )个。

A．1

B．2

C．0

D．3

About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along fine on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course. The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen.The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots with organic nitrogen compounds. This comes in handy for the growth of buds in the early spring when leaves are not yet functioning. Once leaves begin photosynthesizing, they produce protein, but only mature leaves can "export" protein to the rest of the plant in the form of amino acids.

According to the passage, what is ATP

A．A biochemical process.

B．The tip of a root.

C．A chemical compound.

D．A type of plant cell.

二次回路中的跳闸连接片又叫（）

A.换相片

B.转换板

C.跳闸压板

D.保护投切开关

不属于其他货币资金核算范围的是( )。

A．银行汇票存款

B．在途货币资金

C．外汇存款

D．外埠存款

一国两制是以宪法和法律为保障的，不会随意改变。( )