为庆祝建国60周年，学校举行书画作品展，每班选送9件作品，8个班一共选送多少件书

下列现象属于液化的是（　　）

A．洒在地面上的水干了

B．屋顶的瓦上结了一层霜

C．早晨的浓雾

D．冬天室外冰冻的衣服干了

肾移植急性排斥反应中细胞介导及抗体介导的急性排斥反应，病理学上的主要区别为（）

A.间质是否水肿

B.动脉炎性反应

C.动脉壁坏死

D.动脉腔内血栓形成

E.动脉壁中性粒细胞浸润

下列反应中，浓硫酸表现出强氧化性的是

①用铁槽车盛装浓硫酸 ②铜片与浓硫酸共热制备SO₂

③将含水蒸气的氯气通过盛浓硫酸的洗气瓶

④浓硫酸吸收NH₃ ⑤浓硫酸使蔗糖炭化时有刺激性气体产生

A．①②④

B．③④⑤

C．①②⑤

D．②⑤

Leo Johnson is a Level Ⅲ candidate in the CFA Program and joins an online forum of candidates studying for the Level Ⅲ exam. Johnson writes on the forum: "Hi, I am a Level Ⅲ candidate in the CFA Program. A colleague who took the Level Ⅲ exam this June tells me that it's very difficult especially on the essay questions requiring tax calculation of personal investment policy statement" . Has Johnson most likely violated the Standards of Professional Conduct（）

A. No.

B. Yes, by improperly referencing the CFA designation.

C. Yes, by revealing confidential information about the CFA exam.

下列哪类肿瘤一般不发生钙化（）

A.颅咽管瘤

B.垂体微腺瘤

C.脑膜瘤

D.室管膜瘤

E.少枝胶质细胞瘤