向日葵花盘下面的总苞是由若干苞片聚集形成，苞片属于（） A.叶变态 B.根变态 C.

评定混凝土强度采用的标准试件的尺寸，应为以下何种所示（）。

A.100mm*100mm*100mm

B.150mm*150mm*150mm

C.150mm*150mm*300mm

D.200mm*200mm*200mm

Helen and Martin

With a thoughtful sigh, Helen turned away from the window and walked back to her favourite armchair. (51) her brother never arrive For a brief moment, she wondered if she really cared that much.

Over the years Helen had given (52) waiting for Martin to take an interest in her. Her feelings for him had gradually (53) until now, as she sat waiting for him, she experienced no more than a sister’s (54) to see what had (55) of her brother.

Almost without (56) , Martin had lost his job with a busy publishing company after spending the last eight years in New York as a key figure in the US office. Somehow the two of them hadn’t (57) to keep in touch and, left alone, Helen had slowly found her (58) in her own judgement growing. (59) the wishes of her parents, she had left university halfway (60) her course and now, to the astonishment of the whole family, she was (61) a fast-growing reputation in the pages of respected art magazines and was actually earning enough to live (62) from her paintings.

Of course, she (63) no pleasure in Martin’s sudden misfortune, but she couldn’t (64) looking forward to her brother’s arrival with (65) satisfaction at what she had achieved.

54().

A. wonder

B. idea

C. curiosity

D. regard

目前肺癌患者的标准手术方式是（）

A.肺楔形切除术

B.肺段切除术

C.肺叶切除术

D.全肺切除术

E.肺叶切除+淋巴结清扫术

蒸汽锅炉蒸发量越大，单位水容积越小，在相同的时间内，金属表面接触到的溶解氧也就越多。因此，《低压锅炉水质》标准中规定，蒸汽锅炉额定蒸发量大于等于6t∕h时给水应除氧，额定蒸发量小于6t∕h的锅炉应尽量除氧，如发现局部腐蚀时，给水应采取除氧措施。一般采用热力除氧，也可采用其他除氧方法。（）

梁下部纵向受力钢筋接头位置宜设置在（）。

A.梁跨中1/3处

B.梁支座处

C.距梁支座1/3处

D.可随意设置