【简答题】Why did Fred write “I’m so glad I invested in you” in his letter? Because he could pay his _____ bills with the money she paid him back, plus 14-percent annual interest .
【单选题】Why did Fred write “I’m so glad I invested in you” in his letter?
A.
Because she finally opened her own firm.
B.
Because he could pay his medical bills with the money she paid him back, plus 14-percent annual interest
C.
Because the author paid him back the money
【单选题】2011年3月某企业开始自行研发一项非专利技术,至2011年12月31日研发成功并达到预定可使用状态,累计研究支出为160万元,累计开发支出为500万元(其中符合资本化条件的支出为400万元)。该非专利技术的研发的费用化支出为( )万元。
【多选题】世界八大奇迹之一,也是埃及的象征是( )。
【简答题】(6分)实验是学习化学的重要手段,通过实验可以培养实践能力和创新精神。 (一)结合图1实验装置回答有关问题: (1)图1是加热固体的装置,指出其中的错误____。在不改变酒精灯位置的前提下,改正错误需要操作的旋钮是____(填字母)。 (2)使用图1装置前需要检查装置的气密性,方法是____。 (二)某实验小组利用图2所示装置测量空气中氧气体积分数并取得成功。 [查阅资料]白磷的着火点40℃。 [...
【单选题】Why did Fred write “I’m so glad I invested in you” in his letter?
A.
Because she finally opened her own firm.
B.
Because he could pay his medical bills with the money she paid him back
C.
Because the author paid him back the money
【单选题】Why did he/she write the letter?
A.
Because Lin Jin is ill.
B.
Because Lin Jin’s father is ill.
C.
Because Lin Jin’s mother is ill.
D.
Because Lin Jin has something to do.
【简答题】根据下图回答问题。 (1)仪器①的名称是 。 (2)实验室制备和收集二氧化碳应选用的装置是(填序号) ,反应的化学方程式 为 ,检验二氧化碳是否收集满的方法是 。 (3)若实验室用无水醋酸钠固体和碱石灰固体共热制取甲烷。 应选用的发生装置是(填序号) 。 (4)若实验室用D装置收集氧气,进行铁丝(已打磨光亮)燃烧的实验。请填写下列空白: 操作步骤 铁丝燃烧的实验现象 铁丝燃烧的化学反应方程式 ① ...