用4cm、8cm和（ ）的小棒，都可以围成三角形。（取整厘米数） A．4cm B．4

单词拼写

小题1:Kindness is one of his c_________.

小题2:How many countries does the UK c________ of?

小题3:Being e_______ to the sun is harmful to your skin.

小题4:He was a_______ of stealing.

小题5:She said that she a______ her knowledge of English by her careful study.

小题6:He has an __________(乐观的) attitude toward his future.

小题7:Exhausted, I ______（溜进）into bed and fell fast asleep.

小题8:His friends were _________ (热心的) about his theory.

小题9:Jane was writing a letter and __________(同时) Pat was watching TV.

小题10:A giant machine, always ________ (贪婪的) for more, swallows all the waste.

以下不属于分子生物学HLA分型法的是（）.

A.PCR-RFLP

B.LAMP-PCR

C.PCR-SSCP

D.SBT

E.PCR-SS0

另一同学在“用单摆测定重力加速度”的实验中，用的摆球密度不均匀，无法确定重心位置.他第一次量得悬线长为l₁(不计半径)，测得周期为T₁；第二次量得悬线长为l₂，测得周期为T₂.根据上述数据，g=__________.

乙型肝炎的传染源主要是（）

A.急性感染者

B.慢性感染者

C.自限性感染者

D.隐性感染者

E.潜伏性感染者

经营租赁的租赁费用作为长期负债进行处理。( )