随机投掷两个均匀的正方体骰子，两个骰子的点数之和为7的概率是（ ） A．112 B．

荣获2001年诺贝尔生理学奖的三位科学家研究发现了调节真核细胞周期的关键因子。其中美国的利兰·哈特韦尔发现了对细胞周期的最初阶段起调控作用的“START”基因，在下图中“START”基因起作用的时期是（）.

A．a-b

B．d-e

C．f-g

D．g-h

晚清的新学之士，提及开通民智，总是首推报馆与学校。二者同为“教育人才指导”、“传播文明”之“利器”，却因体制及利益不同，无法( )。

A．珠联璧合

B．相辅相成

C．相得益彰

D．取长补短

At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were   36   to show that we all have “a body clock”   37    us, which controls the   38   and fall of our body energies,   39   us different from one day one to the next.

The   40   of “a body clock” should not be too   41   since the lives of most living things are controlled   42   the 24 hour night-and-day cycle. We feel   43   and fall asleep at night and become   44   and energetic during the day. If the 24 hour-cycle is   45   , most people experience unpleasant   46   . For example, people who are not   47   to working at night can find that   48   of sleep causes them to   49   badly at work.

50   the daily cycle of sleeping and   51  , we also have other cycles which   52   longer than one day. Most of us would   53   that we feel good on some days and not so good on    54   ; sometimes our ideas seem to flow and at other times, they   55   do not exist.

36．A．anxious                  B．able                        C．careful                    D．proud

37．A．inside                     B．around                    C．between                  D．on

38．A．movement                     B．supply                    C．use                         D．rise

39．A．showing                 B．treating                   C．making                   D．changing

40．A．invention                B．opinion                   C．story                      D．idea

41．A．difficult                  B．exciting                  C．surprising               D．interesting

42．A．from                      B．by                          C．over                       D．during

43．A．dull                       B．tired                             C．dreamy                  D．peaceful

44．A．regular                   B．excited                   C．lively                            D．clear

45．A．disturbed                B．shortened                C．reset                       D．troubled

46．A．moments                B．feelings                  C．senses                     D．effects

47．A．prevented               B．allowed                  C．expected                 D．used

48．A．miss                      B．none                       C．lack                        D．need

49．A．perform                  B．show                      C．manage                   D．control

50．A．With                      B．As well as               C．Except                    D．Rather than

51．A．working                 B．moving                   C．living                     D．waking

52．A．repeat                     B．remain                    C．last                         D．happen

53．A．agree                      B．believe                   C．realize                   D．allow

54．A．other                      B．the other                 C．all other                  D．others

55．A．just                        B．only                       C．still                        D．yet

进行石材抗压强度试验时，石材立方体试件的尺寸为（）

A、150mm

B、100mm

C、70mm

D、50mm

导向平键一般是采用（）。

A.过盈键连接

B.较松键连接

C.较紧键连接

D.紧键连接