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古典主义音乐流派从十八世纪下半叶起，以（）为中心形成的音乐流派，代表人物是巴赫、（）、（）（）、莫扎特、海顿。

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Estimating schedule activity costs involves developing an (1) of the cost of theresources needed to complete each schedule activity. Cost estimating includes identifying and considering various costing alternatives. for example, in most application areas, additionalwork during a design phase is widely held to have the potential for reducing the cost of the execution phase and product operations. the cost estimating process considers whether the expected savings can offset the cost of the additional design work. cost estimates are generally expressed in units of (2) to facilitate comparisons both within and across projects.the (3) describes important information about project requirement that is considered during cost estimating.空白（3）处填（）

A. project scope statement
B. statement of work
C. project management plan
D. projectpolicy

致神经炎作用最强的周围神经髓鞘抗原为（）

A. P₀蛋白
B. P₁蛋白
C. P₂蛋白
D. 髓鞘结合糖蛋白
E. 神经节苷脂

下列（）是三位有效数字。

A. 0.0170
B. 0.1070
C. 1.7×10
D. 1070

试述甲亢危象的治疗原则。