能使光能变成化学能的是( )
A.细胞质
B.叶绿体
C.线粒体
D.细胞核
答案:B
在叶绿体中,能够进行光合作用,光合作用的过程就是将光能转变为化学能,储存在制造的有机物中。
下列各项中,可用于治理通货膨胀的货币政策措施是()。
A.提高法定存款准备金率
B.降低利率
C.降低再贴现率
D.公开市场上买人政府债券
In (66) the strength of the carrier signal is varied to represent binary 1 or 0. (67) is a system that can map a name to an address and conversely an address to al name. (68) is a three-way handshaking authentication protocol that it’s packets are encapsulated in the point-to-point protocol. (69) is an approach that enables an ATM switch to behave like a LAN switch. (70) is an guided media which is made of glass or plastic and transmits signals in the form of light.
A.PPP
B.PAP
C.CHAP
D.LCP